Weapons are a different class of tool, with different hazards, especially when MIS-used.

There's nothing else with a 100% identical comparison to a firearm, but that doesn't mean that some parallels can't be drawn.

How many people have been showing someone their new knife and they accidentally cut their finger on it?

How many people have been showing someone their new motorcycle and then crash it?

If the four rules of gun safety would have been followed, THIS tragedy wouldn't have occurred. Accidents happen when you mis-use ANY tool, and firearms have the capability of being one of the most deadly tools around.